Notched electrode and method of making same
First Claim
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1. An electrode for an electrochemical cell, said electrode comprising a length having a first end and a second end and a width having a first edge and a second edge, and at least one notch along one of said first and second edges;
- wherein said electrode is wound in continuous wraps about an axis parallel to the electrode width and said at least one notch is at least as long as the circumference of the outermost wrap of said electrode.
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Abstract
An electrode having a notch along one edge is provided. The notch prevents unintentional internal shorting between the electrode and internal cell structures having an opposing polarity. In a preferred embodiment, the electrode is used in jellyroll electrochemical cells to avoid contact between the most exterior electrode wrap of the jellyroll and the can. A method of making such an electrode from a continuous strip of electrode material is also provided.
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Citations
34 Claims
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1. An electrode for an electrochemical cell, said electrode comprising a length having a first end and a second end and a width having a first edge and a second edge, and at least one notch along one of said first and second edges;
- wherein said electrode is wound in continuous wraps about an axis parallel to the electrode width and said at least one notch is at least as long as the circumference of the outermost wrap of said electrode.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of making an electrode structure for an electrochemical cell, said method comprising the steps of providing an electrode having a length extending between a first end and a second end and a width extending between a first edge and a second edge;
- creating at least one notch along one of said first and second edges; and
winding said electrode in continuous wraps about an axis parallel to the electrode width;
wherein said, at least one notch is at least as long as the circumference of the outermost wrap of said electrode. - View Dependent Claims (12, 13, 14, 15)
- creating at least one notch along one of said first and second edges; and
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16. A method of making an electrode for an electrochemical cell, said method comprising providing a strip of electrode material having a leading end and a width extending between a first edge and a second edge;
- creating a notch along one of said first and second edges of said strip; and
winding said electrode in continuous wraps about an axis parallel to the electrode width;
wherein said notch is at least as long as the circumference of the outermost wrap of said electrode. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24)
- creating a notch along one of said first and second edges of said strip; and
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25. A method of making an electrode for an electrochemical cell, said method comprising providing a continuous strip of electrode material having a leading end and a width extending between a first edge and a second edge, and creating a notch along one of said first and second edges of said strip;
- wherein the step of creating the notch further comprises separating the continuous electrode strip into a first piece and a second piece, wherein said second piece is still attached to the continuous electrode strip.
- View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34)
Specification